Patents by Inventor David L. Leland

David L. Leland has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5705649
    Abstract: The present invention provides novel dyes for staining proteins, particularly those in electrophoretic gels, and detecting the proteins with high sensitivity. The dyes of the invention are derivatives of known dyes that are more hydrophobic than the corresponding, known dyes and, in electrophoretic gels, including polyacrylamide gels with sodium dodecyl sulfate, form easily detectable, non-covalent complexes with proteins. In some cases, the corresponding, known dyes bind to protein covalently. The complexes of protein with some dyes of the invention can be detected with high sensitivity simply by observation of the color of the complexes by eye. The complexes of protein with other dyes of the invention are detected by observation of the fluorescence of the complexes. Dyes of the invention include derivatives of Coomassie.RTM. dyes, acid blue 25, dansyl chloride, fluorescein, 2-methyl-2,4-diphenyl-3(2H)-furanone, and (7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino alkanoates.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: January 6, 1998
    Assignee: Promega Corporation
    Inventors: John W. Shultz, David L. Leland
  • Patent number: 5273906
    Abstract: The present invention provides novel dyes for staining proteins, particularly those in electrophoretic gels. The dyes of the invention are derivatives of Coomassie.RTM. dyes. The invention also provides quantitative and qualitative methods for detecting proteins by staining the proteins with a dye of the invention.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: December 28, 1993
    Assignee: Promega Corporation
    Inventors: John W. Shultz, David L. Leland
  • Patent number: 5132439
    Abstract: The present invention provides novel dyes for staining protein, particularly those in elecrophoretic gels. The dyes of the invention are derivatives of Coomassie.RTM. dyes. The invention also provides quantitative and qualitative methods for detecting proteins which comprise staining the proteins with a dye of the invention.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: July 21, 1992
    Assignee: Promega Corporation
    Inventors: John W. Schultz, David L. Leland
  • Patent number: 4443605
    Abstract: Disclosed are 7.beta.-arylalkyl substituted morphinan compounds characterized by the formula: ##STR1## In the above formula, R is H or methyl, R.sub.1 is methyl, cyclopropylmethyl or cyclobutylmethyl and n is 2 to 5.
    Type: Grant
    Filed: July 30, 1982
    Date of Patent: April 17, 1984
    Assignee: Miles Laboratories, Inc.
    Inventors: Michael P. Kotick, David L. Leland
  • Patent number: 4440932
    Abstract: Disclosed are 7.beta.-arylalkyl-7.alpha.-methyl-6-oxo or 6.alpha.-hydroxy-3-methoxy or 3-hydroxy-4,5.alpha.-epoxy-17-methyl or 17-cycloalkylmethyl-morphinans of the formula: ##STR1## wherein R is H or methyl, X is oxo or .alpha.-hydroxy, n is 2 to 4 and R.sub.1 is methyl, cyclopropylmethyl or cyclobutylmethyl. These compounds are useful as strong analgesics.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: April 3, 1984
    Assignee: Miles Laboratories, Inc.
    Inventors: Michael P. Kotick, David L. Leland
  • Patent number: 4440931
    Abstract: Disclosed are 7.beta.-alkyl or arylalkyl-3-methoxy or hydroxy-4,5.alpha.-epoxy-6.beta.-hydroxy-7.alpha.-hydroxymethyl-17-methyl or cycloalkylmethylmorphinans of the formula: ##STR1## In the above formula, R is H or methyl, R.sub.1 is methyl, cyclopropylmethyl or cyclobutylmethyl, n is 2 to 4 and Y is H or phenyl. These compounds are useful as narcotic analgesics.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: April 3, 1984
    Assignee: Miles Laboratories, Inc.
    Inventors: Michael P. Kotick, David L. Leland, Joseph O. Polazzi
  • Patent number: 4275205
    Abstract: Disclosed are 7,7-dimethyl-4,5.alpha.-epoxy-morphinan-6-one compounds characterized by the formula: ##STR1## wherein R is H or CH.sub.3, R.sub.1 is H, CH.sub.3 or CH.sub.2 CH.sub.3 and R.sub.2 is cyclopropylmethyl or cyclobutylmethyl. Particular compounds circumscribed by the foregoing formula are useful as analgesics, narcotic antagonists or mixed analgesics/narcotic antagonists.
    Type: Grant
    Filed: May 5, 1980
    Date of Patent: June 23, 1981
    Assignee: Miles Laboratories, Inc.
    Inventors: Michael P. Kotick, David L. Leland
  • Patent number: 4272541
    Abstract: Disclosed are 7,8 and 7-8 substituted 4,5.alpha.-epoxymorphinan-6-one compounds characterized by the structural formula: ##STR1## In the foregoing formula R.sub.1 may be H or methyl, R.sub.2 is cyclopropylmethyl, cyclobutylmethyl, allyl or tetrahydrofurfuryl, R.sub.3 is H, .beta.-methyl, .beta.-ethyl or .alpha.-ethyl and R.sub.4 is H or .alpha.-methyl. Particular compounds corresponding to the foregoing description are useful as mixed analgesics/narcotic antagonists whereas others have been found to be pure narcotic antagonists.
    Type: Grant
    Filed: July 11, 1979
    Date of Patent: June 9, 1981
    Assignee: Miles Laboratories, Inc.
    Inventors: Michael P. Kotick, Robert N. Schut, Joseph O. Polazzi, David L. Leland
  • Patent number: 4242514
    Abstract: Disclosed is a novel method for the introduction of a 7-methyl group into the morphinan nucleus to thereby provide precursors for the preparation of therapeutically useful 7-methyl-4,5.alpha.-epoxy morphinan and morphinan-6-one compounds. The method involves reacting thebaine, dihydrothebaine or the enol acetate of dihydrocodeinone with lithium dimethyl cuprate to form the corresponding 7-methyl-4,5.alpha.-epoxy cleaved product.
    Type: Grant
    Filed: October 17, 1979
    Date of Patent: December 30, 1980
    Assignee: Miles Laboratories, Inc.
    Inventor: David L. Leland
  • Patent number: 4230712
    Abstract: Disclosed are 7-methyl, 8.beta.-lower alkyl and 7 methyl-8-lower alkyl substituted B/C Cis or Trans morphinan-6-one compounds characterized by the structural formula: ##STR1## Specific compounds, included within the scope of the foregoing general formula wherein R.sub.1 is H or methyl, R.sub.2 is cyclopropylmethyl or cyclobutylmethyl, R.sub.3 is H, methyl, ethyl or n-propyl and R.sub.4 is H or methyl are useful as mixed analgesics/narcotic antagonists.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: October 28, 1980
    Assignee: Miles Laboratories, Inc.
    Inventors: Michael P. Kotick, Robert N. Schut, Joseph O. Polazzi, David L. Leland